Razor blade sharpener



Jan.. 1, 1952 v.-F. sTx-:GNER

RAZOR BLADE SHARPENER INVENTOR vAcL`Av F. STEGNER.

ATTORNEY Jan. 1, 1952 v. F. sTEGN'En 2,581,214

Y RAZOR BLADE: SHARPENER Filed Nov. 17. 1949 '2 SHEETS- SHEET 2 AT TORNEYS Patented Jan. 1, 1952 `UNITED STATES PATENT OFFICE RAZOR BLADE SHARPEN ER Vaclav F. Stegner, Racine, Wis.

Application November 17, 1949, Serial No. 127,952

1 Claim.

My invention appertains to razor blade sharpeners and more particularly to a novel machine for sharpening double-edged razor blades. The blade holder embodies a clamping rod adapted to be oscillated back and forth by a lever secured to one end of said clamping rod and engaging a double faced circular cam, whereby the edges of the blade are alternately forced. against the diagonally positioned upper and lower abrading cylinders to automatically sharpen the blade edges. The double faced circular cam is provided With a spring controlled gate which is moved back and forth across a throat that communicates with the outer and inner circular cam tracks, whereby said clamping rod and its holding tongue are oscillated, the cam being mounted upon the shaft of one of the cylinders to be designated as the master cylinder, the shaft of which master cylinder is manually rotated by a crank.

A further object of my invention is to provide hinged housing sections for the pairs of cylinders, each of said housings being provided With brackets which serve as bearings for the shafts of the abrasive cylinders, the said housing sections being folded one upon the other and locked in their folded` position when a blade sharpening operation is affected.

With the above and other objects in View, which will appear as the description proceeds, the invention resides in the novel construction, combination and arrangement of parts, substantially as hereinafter described, and more particularly defined by the appended claim, it being understood that such changes in the precise embodiment of the herein disclosed invention may be made as come within the scope of the claim.

In the accompanying drawings is illustrated one.

complete example of the physical embodiment of the present invention constructed according to the best mode so far devised for the practical application of the principles thereof.

In the drawings:

Figure l represents a sectional elevation of a razor blade Sharpener embodying the features of my invention, the section being indicated by line I, I of Figure 2.

Figure 2 is a top plan view of the same.

Figure 3 is a cross section through one of the housing sections, the section being indicated by line 3, 3 of-Figure 2.

Figure 4 is an enlarged fragmentary sectional view through one of the sets of abrasive cylinders, the section being indicated by line 4, 4 of Figure 2.

the section being indicated by line 1, 'I of Figure 4.

Figure 8 is a sectional face view of the cam and blade carrying clamping rod form illustrated, its actuating lever riding upon the outer cam face, the section being indicated by line 8, 8 of- Figure 7; and :i

Figure 9 is a face View of the rotatable blade locking tongue.

Referring bycharacters to the drawings, I and I indicate sections of a housing-which are connected by a hinge 2, the said housing sections when folded one upon-the other, as'indicated in dotted lines, Figure 1, are suitably secured by a pin 3 and pivoted latch member 4 mounted upon the housing sections.

Each housing section has fitted therein oppositely disposed bearing brackets 5 and 5', as clearly illustrated in Figure 2 of the drawings. The lower housing section I has journaled in the bearing brackets companion shafts Ii, 6', which shafts and hubs 1 have fitted thereto rubber abrasive cylinders 8, 8. The opposite hinge section of the housing being provided with shafts 9, 9 carrying hubs I0, Ill that are tted with rubber cylinders II. At one end of the cylinder shafts 9, 9 and 6, 6', the same have secured thereto meshed gear .Wheels II', II and II", II", respectively, whereby upon closing of the housing sections, the two pairs of gear connected abrasive cylinders are intermeshed, it being understood that the bottom cylinder 8, for identication, is termed aV master cylinder, the shaft 6 of which extends through the housing section and carries an actuating crank I2, whereby power is applied to the master cylinder and the associated cylinders, through the gear train.

The shaft 6 of the master cylinder has secured thereto a circular cam I3, having an outer cam face I3 and an inner cam face I 3". The-v cam faces are interrupted to form a communicating throat I4 between the same. The throat I4 is controlled by a gate I5, which gate is pivoted to the circular cam and is controlled by a coil spring IIS, whereby said gate is held in one position across the surface of the inner cam face I3", as best shown in Figures 4 and 6 of the drawings.

The housing brackets 5 are provided with centrally disposed projecting necks 5", which necks serve as bearings for a mutilated clamping rod I'I, the said rod being pivotally mounted centrally of the two pairs of abrading cylinders when the same are folded in their Working position..

The clampjngrodll is provided with aflat surface I8, having a central aperture I8 therein, and adjacent the ends of the clamping rod, it. has extending outwardly therefrom oppositely disposed lips I9, and adjacent said lipsthei clamp-- ing rod surface I8 has projecting upwardly there:

from on the flat surface, a pair of pins 20.

Pivotally mounted upon therhatsurface: llof: the clamping rod is a tongue 2I, having ashanl: 2| that is in engagementowith the cena'laperture I 8'.

' The#` endsf- 'of-j thehtonguef 2 Ifl are lock'edf engagement with the lips'Y I9 andi adjacent Vsaidy ends-the lower=face offtheltonguefisformedwith channels 2201 frfclearing' the' -pins2-lI-E Also' secured to one end of the clamping-frod is a rocking lever 22 having a roller: 22-"-at\`-its freelend;- which roller is--adapted vto ridesV upon the inner r or router-4 circular cam faces 5I 3i, I Si', whereby the rodI'Iis'oscillatedfiback andfrth'. The end of the lever 22 is connected to af# coil spring123f: the oppositeend" off" which spring4 is secured fto faf 'nger 23--`thatf extends Lfroms oneffo-f the* brackets` 57"," as'indicated f inf- Figures 4:toA 6v` irrcliisi-ve.'

From the foregoing description, when it iside-Y sired to sharpenfa double edge razor i blade1 '24, the tongue 2| being removed, said-"lrazorfblade is'finsertediover the flatsurfacehof "the clamping rod? and i apertures the blade are#l engaged f by` the-:pins 2 U.'

Thereafter; theclamping:tonguefisladiustedi-initst position upon'-thefclampingrrod 25| and'theF samer is swung abou-ti its pivot studi whereby-fits ends engage the under facesloffftheps 219i: andv theY channels--- 2 97 of the tongue" travel?A overfsaid pins, whereby Athefblade' is securely lcickecllto!the clamping: rod.`

'Thereafterv th'elupperL section- I f 'of' the housing is swungfto =its lockedAv position,l Wherebyithevfourf cylinders'` aref ink meshed engagement *through-fA theirA interlckingfgear-Wheelsf-l and?the-=housir1gV sections-fbeingglockedtogether; all thatis=nec=- essaryf tot shfarper-rthe i blades is'atoz: rotatev the cranked? master cylindr, Wherebyffallf ofrtl'i'ef abradingf cylinders1-aref-putY-into motion and at 'I the' same times-the 'right handilower"edgeffoitlreC blade-sfpressed" against 'fthe abrasive cylinderfv'f, whilef-athelefthand upper-` edge# of theblade eis: pressed'fagainst 'thef-upper 'lefth'and abrasiveffcyl'- inder; as 'indicated 'in idottedlines;Y Figure -=1.,

In thisi position,l the-'rollercz 2 off the f-levers22 will:make= a. complete:revolution-,uponzthe outer" cam fface I 3i. and wherrsa-idf roller-:reachesT the throat f I 4.,- ,thez sprlngpressureupon fits lever f will cause the rollerytoz-drop. downintofthe fthroat andA makea second., complete. turn, `whereby-- the left handlower edge: ci Y thelblade. isesharpened. upon its-face,. while,- theright hand .-upper` edge is sharpenedrupon theoppositeiace.. Whenthis. complete revolution offthe roller is affected, said roller willi engage ,the gate I5, as shown in Figure 6,' wherebythe roller is' deflected upwardly 4 by the gate to again engage the outer cam race I3', thus it will be noted that oscillation of the blade is aiected, due to the lever roller which will alternately drop through the throat from the outer cam surface to the inner cam surface and thereafter be lifted from said inner cam surface to the outer cam surface, in a complete revolution, whereby oscillation of the blade is aectedlto, sharpen theslov/,erl beveled. edge and the 'fupperr beveled". edge; when the,u blade `fengages the master cylinder, and an oblquely disposed upper cylinder While the opposite bevels will also be ground as they engage the surfaces of the oppositelyV disposed oblique abrading cylinders.

Lclaim:

A' sliarpener for double-edge razor blades comprising'housing sections in pivotal connection and adapted to close one over the other, a pair of bearing brackets carried by each housing section, a pair of equally spaced longitudinal shafts journalledi in each' pairY of f bearingbracketsL -respectivelfabrasivez cylindersC mountedf' on saivsl shafts, said "-shafts'rbeing geared-fon synchronous= rotation when the-"housing sections-areclosedione1 over' the other; a crank splined to4 one-'ofsaid siratswherebyk said'- associated'i'abrading cylirrder Y' is; a master" eylid'erf a#camsecured"` on" oneL encl-iofsaidrnasterfcylinder and fadptedtofrotate therewith, saidcam yhavin-g'annu-teit'eircirlaraee and i arr inner: cii'rcuiar-` face andi a th'roati orierr-w ing--forinedfin said-ioutercam'-faceinopen com-1f niunication withf said innerffcam" face?- aTV trans" verselyI extending gate-pivoted lat one fend" to'the` Y inner cam'lfaceland*having-iitsrotlerendlter-eminating adjacent theupper surface oth'eputei face, said pivoted gateadaptedY to 'mover-across saidi throat opening in'4 the` outer='camface?I a spring-secu1ed='to saidlgateeadapted to iesilfiently" urge said? gate-A a-ga-inst one'- endf' of V"thethroat" opening, a longitudinal clampingr rod journall'ed" in` onepair of" said brackets "centralljff between saidab'rasivef cylinders; means `on" 'saidclamping rod -for 'detac-hardy-holdings:t doulle=edge-"blade aleverv 'havingone-*end* secured fto the clamping rod and vits other'end?resilicntly-*securedto'said bracket; anda-'roller mountedonfsaid lever inter;

mediateits ends for" alternately *engaging said cam faces, Wherefynponrotation off' the' cam" said roller-will'bewirged` intotlieopen throat andv ontol the inner cam facerto'iengage*saidl pivoted gate-and move said" gate' aga-inst spring' tension to -the oppositecend'iof thethroatopene ing-'to guide said rollerthrong-hthetlroatopenu ingand onto the outer circular carnfce; there bypau-sing -the cutting' edges "of Athe -bladeto als ternatelyf engage theepairsrof 'dragonally;'disposedl abrading cylinders:

VACLA'VfF." STEGNERE REFERENCE S` CITED The following refrencesare of recordfin.l the. ile of this patent:

UNITED f STATES: BATENTS Number Name Date 1,056,994 Caro July-8,1913? 1,641,074 Feist Aug. 30; 1927f EOlfll'lICrNi PATENTS- ;o Number" Countryr Date*- 223,439 Great Britain -.5 Oct. 23, 192.24- 

